/// 🎯 删除活动参与者请求模型
/// 
/// 用于封装删除活动参与者的请求参数
/// 对应接口: POST /activities/participants/delete
class DeleteParticipantReq {
  final int activityId;
  final int userId;

  DeleteParticipantReq({
    required this.activityId,
    required this.userId,
  });

  /// 转换为JSON（发送给后端）
  Map<String, dynamic> toJson() {
    return {
      'activityId': activityId,
      'userId': userId,
    };
  }
}

